The Tor Browser: gfx/skia/trunk/src/pdf/SkPDFDocument.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/pdf/SkPDFDocument.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/pdf/SkPDFDocument.cpp

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SkPDFCatalog.h"
 #include "SkPDFDevice.h"
 #include "SkPDFDocument.h"
 #include "SkPDFFont.h"
 #include "SkPDFPage.h"
 #include "SkPDFTypes.h"
 #include "SkStream.h"
 #include "SkTSet.h"
 static void addResourcesToCatalog(bool firstPage,
                                   SkTSet<SkPDFObject*>* resourceSet,
                                   SkPDFCatalog* catalog) {
     for (int i = 0; i < resourceSet->count(); i++) {
         catalog->addObject((*resourceSet)[i], firstPage);
     }
 }
 static void perform_font_subsetting(SkPDFCatalog* catalog,
                                     const SkTDArray<SkPDFPage*>& pages,
                                     SkTDArray<SkPDFObject*>* substitutes) {
     SkASSERT(catalog);
     SkASSERT(substitutes);
     SkPDFGlyphSetMap usage;
     for (int i = 0; i < pages.count(); ++i) {
         usage.merge(pages[i]->getFontGlyphUsage());
     }
     SkPDFGlyphSetMap::F2BIter iterator(usage);
     const SkPDFGlyphSetMap::FontGlyphSetPair* entry = iterator.next();
     while (entry) {
         SkPDFFont* subsetFont =
             entry->fFont->getFontSubset(entry->fGlyphSet);
         if (subsetFont) {
             catalog->setSubstitute(entry->fFont, subsetFont);
             substitutes->push(subsetFont);  // Transfer ownership to substitutes
         }
         entry = iterator.next();
     }
 }
 SkPDFDocument::SkPDFDocument(Flags flags)
         : fXRefFileOffset(0),
           fTrailerDict(NULL) {
     fCatalog.reset(new SkPDFCatalog(flags));
     fDocCatalog = SkNEW_ARGS(SkPDFDict, ("Catalog"));
     fCatalog->addObject(fDocCatalog, true);
     fFirstPageResources = NULL;
     fOtherPageResources = NULL;
 }
 SkPDFDocument::~SkPDFDocument() {
     fPages.safeUnrefAll();
     // The page tree has both child and parent pointers, so it creates a
     // reference cycle.  We must clear that cycle to properly reclaim memory.
     for (int i = 0; i < fPageTree.count(); i++) {
         fPageTree[i]->clear();
     }
     fPageTree.safeUnrefAll();
     if (fFirstPageResources) {
         fFirstPageResources->safeUnrefAll();
     }
     if (fOtherPageResources) {
         fOtherPageResources->safeUnrefAll();
     }
     fSubstitutes.safeUnrefAll();
     fDocCatalog->unref();
     SkSafeUnref(fTrailerDict);
     SkDELETE(fFirstPageResources);
     SkDELETE(fOtherPageResources);
 }
 bool SkPDFDocument::emitPDF(SkWStream* stream) {
     if (fPages.isEmpty()) {
         return false;
     }
     for (int i = 0; i < fPages.count(); i++) {
         if (fPages[i] == NULL) {
             return false;
         }
     }
     fFirstPageResources = SkNEW(SkTSet<SkPDFObject*>);
     fOtherPageResources = SkNEW(SkTSet<SkPDFObject*>);
     // We haven't emitted the document before if fPageTree is empty.
     if (fPageTree.isEmpty()) {
         SkPDFDict* pageTreeRoot;
         SkPDFPage::GeneratePageTree(fPages, fCatalog.get(), &fPageTree,
                                     &pageTreeRoot);
         fDocCatalog->insert("Pages", new SkPDFObjRef(pageTreeRoot))->unref();
         /* TODO(vandebo): output intent
         SkAutoTUnref<SkPDFDict> outputIntent = new SkPDFDict("OutputIntent");
         outputIntent->insert("S", new SkPDFName("GTS_PDFA1"))->unref();
         outputIntent->insert("OutputConditionIdentifier",
                              new SkPDFString("sRGB"))->unref();
         SkAutoTUnref<SkPDFArray> intentArray = new SkPDFArray;
         intentArray->append(outputIntent.get());
         fDocCatalog->insert("OutputIntent", intentArray.get());
         */
         SkAutoTUnref<SkPDFDict> dests(SkNEW(SkPDFDict));
         bool firstPage = true;
         /* The references returned in newResources are transfered to
          * fFirstPageResources or fOtherPageResources depending on firstPage and
          * knownResources doesn't have a reference but just relies on the other
          * two sets to maintain a reference.
          */
         SkTSet<SkPDFObject*> knownResources;
         // mergeInto returns the number of duplicates.
         // If there are duplicates, there is a bug and we mess ref counting.
         SkDEBUGCODE(int duplicates =) knownResources.mergeInto(*fFirstPageResources);
         SkASSERT(duplicates == 0);
         for (int i = 0; i < fPages.count(); i++) {
             if (i == 1) {
                 firstPage = false;
                 SkDEBUGCODE(duplicates =) knownResources.mergeInto(*fOtherPageResources);
             }
             SkTSet<SkPDFObject*> newResources;
             fPages[i]->finalizePage(
                 fCatalog.get(), firstPage, knownResources, &newResources);
             addResourcesToCatalog(firstPage, &newResources, fCatalog.get());
             if (firstPage) {
                 SkDEBUGCODE(duplicates =) fFirstPageResources->mergeInto(newResources);
             } else {
                 SkDEBUGCODE(duplicates =) fOtherPageResources->mergeInto(newResources);
             }
             SkASSERT(duplicates == 0);
             SkDEBUGCODE(duplicates =) knownResources.mergeInto(newResources);
             SkASSERT(duplicates == 0);
             fPages[i]->appendDestinations(dests);
         }
         if (dests->size() > 0) {
             SkPDFDict* raw_dests = dests.get();
             fFirstPageResources->add(dests.detach());  // Transfer ownership.
             fCatalog->addObject(raw_dests, true /* onFirstPage */);
             fDocCatalog->insert("Dests", SkNEW_ARGS(SkPDFObjRef, (raw_dests)))->unref();
         }
         // Build font subsetting info before proceeding.
         perform_font_subsetting(fCatalog.get(), fPages, &fSubstitutes);
         // Figure out the size of things and inform the catalog of file offsets.
         off_t fileOffset = headerSize();
         fileOffset += fCatalog->setFileOffset(fDocCatalog, fileOffset);
         fileOffset += fCatalog->setFileOffset(fPages[0], fileOffset);
         fileOffset += fPages[0]->getPageSize(fCatalog.get(),
                 (size_t) fileOffset);
         for (int i = 0; i < fFirstPageResources->count(); i++) {
             fileOffset += fCatalog->setFileOffset((*fFirstPageResources)[i],
                                                   fileOffset);
         }
         // Add the size of resources of substitute objects used on page 1.
         fileOffset += fCatalog->setSubstituteResourcesOffsets(fileOffset, true);
         if (fPages.count() > 1) {
             // TODO(vandebo): For linearized format, save the start of the
             // first page xref table and calculate the size.
         }
         for (int i = 0; i < fPageTree.count(); i++) {
             fileOffset += fCatalog->setFileOffset(fPageTree[i], fileOffset);
         }
         for (int i = 1; i < fPages.count(); i++) {
             fileOffset += fPages[i]->getPageSize(fCatalog.get(), fileOffset);
         }
         for (int i = 0; i < fOtherPageResources->count(); i++) {
             fileOffset += fCatalog->setFileOffset(
                 (*fOtherPageResources)[i], fileOffset);
         }
         fileOffset += fCatalog->setSubstituteResourcesOffsets(fileOffset,
                                                               false);
         fXRefFileOffset = fileOffset;
     }
     emitHeader(stream);
     fDocCatalog->emitObject(stream, fCatalog.get(), true);
     fPages[0]->emitObject(stream, fCatalog.get(), true);
     fPages[0]->emitPage(stream, fCatalog.get());
     for (int i = 0; i < fFirstPageResources->count(); i++) {
         (*fFirstPageResources)[i]->emit(stream, fCatalog.get(), true);
     }
     fCatalog->emitSubstituteResources(stream, true);
     // TODO(vandebo): Support linearized format
     // if (fPages.size() > 1) {
     //     // TODO(vandebo): Save the file offset for the first page xref table.
     //     fCatalog->emitXrefTable(stream, true);
     // }
     for (int i = 0; i < fPageTree.count(); i++) {
         fPageTree[i]->emitObject(stream, fCatalog.get(), true);
     }
     for (int i = 1; i < fPages.count(); i++) {
         fPages[i]->emitPage(stream, fCatalog.get());
     }
     for (int i = 0; i < fOtherPageResources->count(); i++) {
         (*fOtherPageResources)[i]->emit(stream, fCatalog.get(), true);
     }
     fCatalog->emitSubstituteResources(stream, false);
     int64_t objCount = fCatalog->emitXrefTable(stream, fPages.count() > 1);
     emitFooter(stream, objCount);
     return true;
 }
 bool SkPDFDocument::setPage(int pageNumber, SkPDFDevice* pdfDevice) {
     if (!fPageTree.isEmpty()) {
         return false;
     }
     pageNumber--;
     SkASSERT(pageNumber >= 0);
     if (pageNumber >= fPages.count()) {
         int oldSize = fPages.count();
         fPages.setCount(pageNumber + 1);
         for (int i = oldSize; i <= pageNumber; i++) {
             fPages[i] = NULL;
         }
     }
     SkPDFPage* page = new SkPDFPage(pdfDevice);
     SkSafeUnref(fPages[pageNumber]);
     fPages[pageNumber] = page;  // Reference from new passed to fPages.
     return true;
 }
 bool SkPDFDocument::appendPage(SkPDFDevice* pdfDevice) {
     if (!fPageTree.isEmpty()) {
         return false;
     }
     SkPDFPage* page = new SkPDFPage(pdfDevice);
     fPages.push(page);  // Reference from new passed to fPages.
     return true;
 }
 void SkPDFDocument::getCountOfFontTypes(
         int counts[SkAdvancedTypefaceMetrics::kNotEmbeddable_Font + 1]) const {
     sk_bzero(counts, sizeof(int) *
                      (SkAdvancedTypefaceMetrics::kNotEmbeddable_Font + 1));
     SkTDArray<SkFontID> seenFonts;
     for (int pageNumber = 0; pageNumber < fPages.count(); pageNumber++) {
         const SkTDArray<SkPDFFont*>& fontResources =
                 fPages[pageNumber]->getFontResources();
         for (int font = 0; font < fontResources.count(); font++) {
             SkFontID fontID = fontResources[font]->typeface()->uniqueID();
             if (seenFonts.find(fontID) == -1) {
                 counts[fontResources[font]->getType()]++;
                 seenFonts.push(fontID);
             }
         }
     }
 }
 void SkPDFDocument::emitHeader(SkWStream* stream) {
     stream->writeText("%PDF-1.4\n%");
     // The PDF spec recommends including a comment with four bytes, all
     // with their high bits set.  This is "Skia" with the high bits set.
     stream->write32(0xD3EBE9E1);
     stream->writeText("\n");
 }
 size_t SkPDFDocument::headerSize() {
     SkDynamicMemoryWStream buffer;
     emitHeader(&buffer);
     return buffer.getOffset();
 }
 void SkPDFDocument::emitFooter(SkWStream* stream, int64_t objCount) {
     if (NULL == fTrailerDict) {
         fTrailerDict = SkNEW(SkPDFDict);
         // TODO(vandebo): Linearized format will take a Prev entry too.
         // TODO(vandebo): PDF/A requires an ID entry.
         fTrailerDict->insertInt("Size", int(objCount));
         fTrailerDict->insert("Root", new SkPDFObjRef(fDocCatalog))->unref();
     }
     stream->writeText("trailer\n");
     fTrailerDict->emitObject(stream, fCatalog.get(), false);
     stream->writeText("\nstartxref\n");
     stream->writeBigDecAsText(fXRefFileOffset);
     stream->writeText("\n%%EOF");
 }

The Tor Browser / annotate

gfx/skia/trunk/src/pdf/SkPDFDocument.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/pdf/SkPDFDocument.cpp